Questions
The moment of inertia of solid cylinder about its axis is I. It is allowed to roll down an inclined plane without slipping. If its angular velocity at the bottom be then kinetic energy of the cylinder will be
detailed solution
Correct option is C
K.E. =12Iω2+12Mv2 K.E. =12Iω2+12MR2ω2 K.E. =12Iω2+12MR2ω2For a cyclinder, I=12MR2∴ K.E. =12Iω2+Iω2=32Iω2Talk to our academic expert!
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A flywheel is in the form of a uniform circular disc of radius 1 m and mass 2 kg. The work which must be done on it to increase its frequency of rotation from 5 rps to 10 rps is approximately
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